Stock could be called quad pass if that makes more sense, dumb setup. They all should've been single passes from the factory

 

Bringing this back from the dead..

Why would a 2-in/2-out be better then the usual single in/single out?

 

its limited by the hoses going to and from the lim, but that being said, you want to move as much fluid as possible.

 

Its not proven to be better.

 

Does anyone Have one of these? I already purchased one of these and am now waiting for this single pass intercooler to come in the mail and i still can't find a lot of information on it. I just wanted to know if there was anyone else running this or if they've seen differences in Heat dissipation.

 

zfissette ^ up there has one. Check his old threads for some info

 

 

Oh yeah, i just bought the Phenolic spacer as well as the single pass system, i want as much cooling as possible. I was at the drag strip with just a dual pass option B, and large pump with second H/E and on top of that a crappy hose routing and i would see 170* IAT2's at the end of a pass causing my timing to be pulled.

I should have brought some ice, just sitting there ran my temps up to 120 IAT2 before i started ( on a 70* night). I had to leave the car on because it was better to have the radiator fan running and cooling the manifolds than letting it all sit while hot. This is why I am also going to add a switch for my radiator fan and intercooler pump so that i can have it run while i have the car off.

 

damn... i gotta get some cooling mods now.. i dont think just a heat exhanger's gonna cut it

i def. want that phelonic spacer, i wanna go meth (more power anyways!) and i'm still confused. our cars come stock with a single pass why have i never seen a different single pass option? i thought it was all about the dual pass?

 

Eric two in /out single pass was proven to be better, and in fact, single pass ZZP single in/ single out proved to be inferior to dual pass. This was shown on Alexx car two years ago . Posted results, Eric. Distillion on Ontario cobalt clubs monitors his iat2 constantly, and he and Alexx compared over and over. I got to take out the ZZP single pass I had installed for him ,and replaced it with dual pass. Iat2 dropped.

I have my own single pass 2 in /2 out etc. Did the testing for it in 2004/2005 with GM engineering. So frankly I dont really have to worry about opinions, just what we did and measured at the time. Making a single pass and looking at results compared to costs of making the single pass leaves me with this conclusion:

Option B, dual pass with ZZP's excellent phenolic spacer along with a big griffin h/e is probably the best bet overall for cooling (see Distillion's mods) but its cheaper to leave the stock h/e in if you are budget minded and still want as much cooling as you can afford.

 

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lol. if truth be told, the packaging issues with single pass are pretty formidable. Dipstick tube/alternator connection clearances for example; Let alone making the part; It costs over 300 to machine the weld on parts, let aong putting the IM in a mill to open up the other side ready for fabricating. I think dual pass /option B would have been the way to go, but the bean counters would not hear of that for sure.

 

I would love the phenolic spacer but there is so little room between the intake manifold and fan shroud

I may settle on a spacer between the blower and intake manifold

 

fits an Ion NOOOOO problemo. Easier than a Cobalt there is more room to the radiator tie bar on an Ion..

 

I am still in the early stages of retuning my car on my Ported/Single pass IM but I can tell you that it is out performing my old Dual Pass setup. The Charged Air temps are climbing slower and recovering faster. The single inlet/outlet is working.

And I will have Logs to back up the information.

 

You do that yourself or is that a euthanasia design? I ask because he's currently making me one

 

I hope you're talking in terms of cost, not in performance. I've seen logs of single pass from way long ago before anyone knew what it was and it was pretty crazy....

 

300 to machine manifolds from alloy 300 to weld and reassemble. exchange. No one spends that sort of money, well hardly anyone. Must have made 10 of them. One |I screwed up . I love mine...

 

Right I hear that broke ass kids want everything and don't wanna spend a dime, just clearing that you was talkin about cost to performance not over all performance lol
Can't really argue with 10-20 deg above ambient with just single pass and a h/e on a 2.6 m62 lol..

 

and the logs on the two in/two out you say is no good? where are your logs on that? U dont havve a ZZP one in/ one out. I have the data on the zzp one, go to OCC to get it. I am happy you are getting good results with your euthansia package but try to compare things correctly before you jump to conclusions.

 

agreed. The cost numbers add up quick tho, the race griffin BITD was 600; the single pass I make 600, the option B 150 plus install for all this I Figure the cost drives people away, the performance is there no doubt. Then there is the issue of Not Invented Here which is large. I spent a lot of time fooling with this; for example, our shop figured for GM out the root cause for customer complaints of Redlines slowing down on hot days in 2004 - pump wired backwards....

 

Euthanasia made it for me.

You will be very happy with yours.